The Gray Code Decoder and Gray Code Encoder holes will go live in approximately 7 days. Why not try and solve them ahead of time?
Abundant Numbers (Long) in Java in chars. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> ALGOL 68 ArkScript Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Lily Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Calendar Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz Continued Fractions CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Multitap Input Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Alphabetic Numbers Apéry’s Constant Binary Lambda Calculus Connect Four Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Rectangle Fill Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 1st Lydxn 🇨🇦 1,000 84 475ms 12 Dec 2025 2nd JayXon 🇺🇸 988 85 392ms 26 Sep 2025 3rd DialFrost 🇸🇬 955 88 366ms 17 Nov 2025 4th KasperKivimaeki 🇫🇮 944 89 378ms 30 Nov 2025 5th fuzzylojik-golf 🇺🇸 923 91 371ms 24 Sep 2025 5th dokutan 923 91 382ms 24 Sep 2025 5th sean-niemann 🇺🇸 923 91 380ms 24 Sep 2025 5th Shanethegamer 🇺🇸 923 91 469ms 25 Sep 2025 5th nwellnhof 🇩🇪 923 91 495ms 25 Sep 2025 5th Yewzir 🇧🇪 923 91 373ms 2 Oct 2025 5th namelessiw 923 91 410ms 4 Oct 2025 5th Yax42 🇫🇷 923 91 512ms 4 Oct 2025 5th stefangimmillaro 923 91 437ms 6 Oct 2025 5th snoozingnewt 🇨🇦 923 91 380ms 9 Oct 2025 5th CaedenHarper 🇨🇦 923 91 397ms 19 Oct 2025 5th MeWhenI 🇻🇦 923 91 382ms 7 Nov 2025 5th emgordon154 923 91 377ms 9 Feb 2026 5th Steffan153 🇫🇮 923 91 389ms 11 Feb 2026 5th raphaelimahorn 923 91 463ms 11 days ago 5th edsrzf 🇳🇿 923 91 392ms 35 hours ago 5th roelderickx 923 91 388ms 15 hours ago 22nd bitsandbeyond 🇳🇱 913 92 385ms 14 hours ago 23rd kmathis22 903 93 364ms 23 Oct 2025 23rd ethanlally 903 93 477ms 12 Nov 2025 23rd prestosilver 🇺🇸 903 93 428ms 20 hours ago 23rd error256 903 93 355ms 20 hours ago 23rd tomh1012 903 93 383ms 20 hours ago 23rd jkelly467 903 93 375ms 17 hours ago 29th h3ra993huskp 🇯🇵 894 94 472ms 30 Nov 2025 30th Liibe 884 95 427ms 25 Sep 2025 30th piano-miles 884 95 405ms 27 days ago 32nd Schmitt-Very-Cool 857 98 486ms 26 Sep 2025 33rd tigerdan2 🇩🇪 848 99 479ms 30 Nov 2025 33rd elgan65536 🇺🇸 848 99 409ms 19 Feb 2026 33rd albanian-laundromat 848 99 386ms 35 hours ago 33rd Matter1024 🇮🇳 848 99 371ms 32 hours ago 37th Florian-Mt 808 104 456ms 8 Jan 2026 37th blaztoma 🇱🇹 808 104 413ms 27 hours ago 39th jared-hughes 800 105 394ms 24 Sep 2025 39th ravnskjaer 🇩🇰 800 105 442ms 15 Dec 2025 41st kasarino 792 106 368ms 29 hours ago 42nd Protothor 757 111 383ms 30 hours ago 43rd rucin93 🇵🇱 724 116 392ms 27 hours ago 44th janAkali 🇷🇺 689 122 389ms 34 hours ago 45th mrondon8 661 127 403ms 1 Dec 2024 46th janbehrens 🇩🇪 656 128 412ms 19 Nov 2022 46th Betuaredead 656 128 434ms 7 Jan 2023 46th eMGeeneer 656 128 408ms 14 Jun 2024 46th Jacob385 656 128 347ms 1 Apr 2025 46th plastic-bottle 656 128 401ms 28 Aug 2025 51st annaproxy 651 129 409ms 2 Jan 2023 51st LordSir101 651 129 382ms 17 Sep 2025 51st madex 🇩🇪 651 129 345ms 12 hours ago 54th KrausRaus 🇺🇸 646 130 384ms 28 Nov 2022 55th bwat2 641 131 392ms 3 Mar 2023 55th yoshykai 641 131 403ms 26 Mar 2025 57th cbrt-x 636 132 416ms 14 Sep 2023 57th bac0id 636 132 405ms 26 Sep 2023 57th eiburns 636 132 413ms 3 Oct 2023 60th rifatx 632 133 384ms 22 Jul 2024 61st Omega65536 🇩🇪 622 135 404ms 23 Nov 2022 61st Leftykap 622 135 413ms 27 Nov 2022 61st jhpaques 🇫🇷 622 135 416ms 25 Feb 2023 61st Apataras 622 135 410ms 10 Jul 2025 61st Emutis 🇱🇹 622 135 327ms 16 hours ago 66th astdefu 618 136 396ms 13 Dec 2022 67th OriEy 613 137 414ms 27 Apr 2023 68th Pyro569 604 139 410ms 20 Jul 2023 68th riviere-lucas 604 139 400ms 12 Jan 2024 68th msbranicky 604 139 343ms 23 hours ago 71st bidger 600 140 398ms 13 Dec 2022 71st althryenix 600 140 413ms 18 Jan 2023 71st crizin 🇰🇷 600 140 398ms 9 Sep 2023 74th AstroOrbis 596 141 381ms 20 hours ago 75th MrGagnonHPS 583 144 407ms 15 Oct 2023 76th Techdude01 575 146 397ms 26 Nov 2022 77th aDwarfNamedUrist 568 148 385ms 30 Aug 2023 78th luca1339 560 150 410ms 7 Jun 2024 79th null-tangent 556 151 405ms 14 May 2023 79th VladislavGitter 🇪🇸 556 151 394ms 13 Nov 2023 1–80 of 98 Next Last
